CN115813539A - Ablation antenna with integrated circulating water tank and manufacturing method thereof - Google Patents
Ablation antenna with integrated circulating water tank and manufacturing method thereof Download PDFInfo
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- CN115813539A CN115813539A CN202211037588.9A CN202211037588A CN115813539A CN 115813539 A CN115813539 A CN 115813539A CN 202211037588 A CN202211037588 A CN 202211037588A CN 115813539 A CN115813539 A CN 115813539A
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Abstract
The invention discloses an ablation antenna with an integrated circulating water tank and a manufacturing method thereof, wherein the ablation antenna with the integrated circulating water tank comprises the following components: needle bar subassembly, integrated circulation tank and handle shell. The needle bar subassembly includes: radiation head, medium pipe, needle bar, sealing ring, coaxial cable, water injection capillary and coaxial cable connector. The circulation tank includes: the water tank upper cover and the water tank lower cover are provided with a front cavity, a rear cavity, a water inlet pipe mounting hole, a water outlet pipe mounting hole, a coaxial cable connector mounting hole, a needle rod guide groove 17 and a water injection capillary guide groove, and the needle rod assembly penetrates through the circulating water tank. The manufacturing method comprises the following steps: assembling the front end of the needle rod assembly, and performing a second step: assembling the tail end of the needle rod assembly, and the third step: assembling a lower cover of the water tank, and the fourth step: assembling an upper cover of the water tank, and the fifth step: and assembling the handle shell. The circulating water tank adopting the integrated high polymer material has the advantages of simple structure, light weight, good sealing property, simple production operation and low production cost.
Description
Technical Field
The invention relates to the technical field of microwave ablation medical treatment, in particular to an ablation antenna with an integrated cooling circulation water tank and a manufacturing method thereof.
Background
The ablation antenna is an application part of minimally invasive treatment equipment, and energy output by the equipment is radiated into focal tissues from the front end of the antenna; in order to prevent the tissues of the contact part of the normal tissues and the antenna from being scalded in the ablation process, the conventional antenna is provided with a water circulation pipeline in an inner pipe, and cooling water circulation is realized through a water storage device and a water inlet and outlet pipe. The existing water storage device is structurally divided into a plurality of water tanks, most of the existing water storage device is assembled by the plurality of water tanks, the water tanks are sealed by sealing rings, and the sealing rings have aging phenomena, so that the water tanks are easy to leak; the other part uses single water tank chamber welding to form, is connected to the needle bar front end by advancing water piping connection through the capillary and realizes the hydrologic cycle, and the water tank welding leaks easily, and welding temperature is high uses the scaling powder, leads to the inside oxidation of water tank serious, causes the capillary jam that intakes easily, leads to the operation in-process needle bar to generate heat, scalds normal tissue. The metal water tank is heavy overall and is easy to deviate in the operation process, so that the ablation position deviates.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an ablation antenna with an integrated circulating water tank, which comprises a needle rod assembly, the integrated circulating water tank and a handle shell.
The needle bar subassembly includes: the radiation head 1, the medium pipe 2, the needle bar 3, the sealing ring 4, the coaxial cable 5, the water injection capillary 6, the T-shaped piece 11 and the coaxial cable connector 12.
An inner core 5.1 of the coaxial cable 5 is arranged in a radiation head blind hole 1.1 at the tail end of the radiation head 1 to be electrically connected and fixed by mechanical compression. The medium tube 2 is positioned at the tail end of the radiation head 1, and the gap between the front end of the medium tube 2 and the end face of the radiation head 1 is not more than 0.2mm. The sealing ring 4 is arranged at the tail end of the medium pipe 2 and seals the gap between the needle bar 3 and the coaxial cable 5. The front end of the needle rod 3 is arranged at the step of the medium pipe 2, so that the gap between the front end surface of the needle rod 3 and the step end surface of the medium pipe 2 is not more than 0.2mm. The water injection capillary tube 6 is sleeved between the coaxial cable 5 and the needle rod 3, and the front end of the water injection capillary tube 6 extends to the position of the sealing ring 4.
A water inlet channel is formed in a gap between the outer wall of the coaxial cable 5 and the inner wall of the water injection capillary tube 6; a water outlet channel is formed in a gap between the inner wall of the needle rod 3 and the outer wall of the water injection capillary tube 6; the water channel turns back at the sealing ring 4.
The T-shaped piece 11 is sleeved on the tail section of the coaxial cable 5 and is sealed with the contact surface of the coaxial cable 5, the inner core 5.1 at the tail end of the coaxial cable 5 is welded with the inner needle 12.1 of the coaxial cable connector 12 to form electric connection, and the tail section of the coaxial cable 5 is bent to 90 degrees.
The needle bar assembly is formed so far that the radiation head 1 is integrated into the coaxial cable connector inner needle 12.1.
The integrated circulation tank includes: the water tank upper cover 7 and the water tank lower cover 8 are provided with two valves, a water tank front cavity 14 and a water tank rear cavity 15 are arranged in the integrated circulating water tank, a water inlet pipe mounting hole 7.1, a water outlet pipe mounting hole 7.2 and a coaxial cable connector mounting hole 7.3 are formed in the water tank upper cover 7, and a needle rod guide groove 17 and a water injection capillary guide groove 18 are reserved after the water tank upper cover 7 and the water tank lower cover 8 are buckled.
The needle bar component penetrates through the circulating water tank, the tail section of the needle bar 3 is arranged in the needle bar guide groove 17, and the end surface of the tail part of the needle bar 3 is flush with the outer side wall 8.1 of the front cavity 14 of the water tank; the tail section of the water injection capillary tube 6 is arranged in the water injection capillary tube guide groove 18, and the tail end face of the water injection capillary tube 6 is flush with the inner side wall 8.2 of the water tank rear cavity 15.
The T-shaped piece 11 is arranged in the coaxial cable connector mounting hole 7.3 in an interference fit mode, and the contact surface of the T-shaped piece and the coaxial cable connector mounting hole is sealed.
The buckling surface of the upper water tank cover 7 and the lower water tank cover 8 is sealed, the needle bar guide groove 17 and the water injection capillary guide groove 18 of the upper water tank cover 7 and the lower water tank cover 8 are respectively sealed with the tail section of the needle bar 3 and the tail section of the water injection capillary 6, and the needle bar assembly and the sealed circulating water channel are fixed by buckling two flaps of the upper water tank cover 7 and the lower water tank cover 8. The contact surface sealing of the water tank upper cover 7 and the water tank lower cover 8 around the water tank front cavity 14 is realized, and the contact surface sealing of the water tank upper cover 7 and the water tank lower cover 8 around the water tank rear cavity 15 is realized.
The coaxial cable connector housing 12.2 is mechanically crimped and fixed to the exposed portion of the T-piece 11.
The water inlet pipe joint 9 is arranged in a water inlet pipe assembling hole 7.1 of the water tank upper cover 7, and the combination surface of the water inlet pipe joint and the water inlet pipe assembling hole is sealed; the water outlet pipe joint 10 is arranged in a water outlet pipe assembly hole 7.2 of the water tank upper cover 7, and the combination surface of the water outlet pipe joint and the water tank upper cover is sealed.
So far, the needle bar component and the water tank component form an integrated needle bar water tank component, the circulating water of the structure flows into a cavity 15 behind the water tank from the water inlet pipe joint 9, flows to the front end of the needle bar 3 through a gap between the inner wall of the water injection capillary pipe 6 and the outer wall of the coaxial cable 5, turns back at the sealing ring 4, then flows back to a cavity 14 in front of the water tank through a gap between the inner wall of the needle bar 3 and the outer wall of the water injection capillary pipe 6, and flows out through the water outlet pipe joint 10 to form the whole water path circulation.
The handle shell 13 comprises a left flap and a right flap, and the needle rod water tank component is arranged in the handle shell 13 and fixed.
The seal may be UV light cured using UV glue or sealed using ultrasonic welding.
The integrated circulating water tank is made of high polymer materials such as PC, PP, ABS and the like.
The invention also provides a manufacturing method of the ablation antenna with the integrated circulating water tank, which comprises the following steps:
the first step is as follows: needle bar assembly front end assembly
An inner core 5.1 of a coaxial cable 5 penetrates into a radiation head blind hole 1.1 at the tail end of a radiation head 1 to be mechanically crimped, a medium tube 2 is sleeved on the tail end of the radiation head 1 and fixed, and the gap between the front end of the medium tube 2 and the end face of the radiation head 1 is not more than 0.2mm; the sealing ring 4 is sleeved in the coaxial cable 5 to the tail end of the medium tube 2, the needle rod 3 is sleeved in the coaxial cable 5 and pushed to the step of the medium tube 2 and fixed, so that the gap between the front end face of the needle rod 3 and the step end face of the medium tube 2 is not more than 0.2mm, and the water injection capillary tube 6 is sleeved in the coaxial cable 5 to the sealing ring 4.
So far, the assembly of the front end of the needle bar component is completed, and the inner core 5.1 of the coaxial cable 5 is electrically connected with the radiation head 1; the clearance between 5 outer walls of coaxial cable and the inner wall of water injection capillary 6 forms the water inlet channel, and the clearance between 3 inner walls of needle bar and the outer wall of water injection capillary 6 forms the water outlet channel, and the water course turns back at sealing washer 4 department.
The second step is that: needle bar assembly tail end assembly
Sleeving the T-shaped part 11 into the tail section of the coaxial cable 5, and carrying out ultraviolet irradiation curing sealing on the coaxial cable 5 and the inner hole of the T-shaped part by adopting UV glue; an inner core 5.1 at the tail end of the coaxial cable 5 is connected with an inner needle 12.1 of the coaxial cable connector in a welding mode, and then the coaxial cable 5 is bent to 90 degrees.
The assembly of the semi-finished needle bar assembly is now completed, so that the radiation head 1 is integrated into the coaxial connector inner needle 12.1.
The third step: water tank lower cover assembly
The integrated circulating water tank is formed by buckling a lower water tank cover 8 and an upper water tank cover 7, and the two valves of the water tank are buckled to fix the needle rod component and seal the circulating water channel.
The needle bar placing component stretches across the lower cover 8 of the water tank, and the needle bar 3 and the water injection capillary tube 6 are respectively arranged in a needle bar guide groove 17 and a water injection capillary tube guide groove 18; the end face of the tail part of the needle rod 3 is flush with the outer side wall 8.1 of the water tank front cavity 14, and the end face of the tail part of the water injection capillary tube 6 is flush with the inner side wall 8.2 of the water tank rear cavity 15.
And (3) dripping UV glue into the contact surface of the needle rod 3 and the needle rod guide groove 17 and the contact surface of the water injection capillary tube 6 and the water injection capillary tube guide groove 18 to perform ultraviolet light curing and sealing, so that the contact surface of the needle rod 3 and the water tank lower cover 8 is sealed and fixed, and the contact surface of the water injection capillary tube 6 and the water tank lower cover 8 is sealed and fixed.
The fourth step: water tank upper cover assembly
Pressing the T-shaped piece 11 into the mounting hole 7.3 of the coaxial cable connector in an interference fit manner, and performing ultraviolet irradiation curing sealing on the contact surface of the T-shaped piece and the mounting hole by adopting UV (ultraviolet) glue; the contact surface of the T-shaped part 11 and the coaxial cable 5 is cured and sealed by ultraviolet irradiation by adopting UV glue.
The upper cover 7 of the water tank is buckled on the lower cover 8 of the water tank, and the contact surface of the needle rod 3 and the needle rod guide groove 17 of the upper cover 7 of the water tank and the contact surface of the water injection capillary 6 and the water injection capillary guide groove 18 of the upper cover 7 of the water tank adopt UV glue for ultraviolet light curing and sealing. The contact surface of the needle bar 3 and the water tank upper cover 7 is fixed in a sealing way, and the contact surface of the water injection capillary tube 6 and the water tank upper cover 7 is fixed in a sealing way.
The buckling surfaces of the upper water tank cover 7 and the lower water tank cover 8 are sealed by ultrasonic welding, so that the sealing of the front water tank cavity 14 and the sealing of the rear water tank cavity 15 are realized.
The coaxial cable connector housing 12.2 is mechanically crimped and fixed to the exposed portion of the T-piece 11.
Pressing a water inlet pipe joint 9 into a water inlet pipe assembling hole 7.1 of a water tank upper cover 7, and carrying out ultraviolet light curing and sealing on a combined surface by adopting UV glue; the water outlet pipe joint 10 is pressed into a water outlet pipe assembling hole 7.2 of the water tank upper cover 7, and the combined surface is cured and sealed by ultraviolet light irradiation by adopting UV glue.
In addition, the buckling surface of the upper water tank cover 7 and the lower water tank cover 8 can be cured and sealed by adopting UV glue, and the UV glue is dripped into the buckling surface of the upper water tank cover 7 and the lower water tank cover 8 to perform ultraviolet light curing and sealing.
So far the needle bar assembly and the water tank assembly form a whole, and the assembly of the needle bar water tank assembly is completed.
The fifth step: handle housing 13 assembly
The handle shell 13 is a left flap and a right flap, the assembled needle rod water tank assembly is clamped into a notch in the handle shell 13, and the other flap of the handle shell is covered and pressed to complete the integral assembly of the ablation antenna.
The invention is an improvement of the water tank structure, and has the following beneficial effects:
firstly, the water tank is light in weight, so that the overall weight of the ablation antenna is reduced, the ablation antenna is convenient to hold in an operation process, the stability of holding operation is improved, and the displacement caused by long-time holding of the ablation needle is overcome.
Secondly, the integrated circulating water tank is simple in structure, and the problem of water leakage between the separated water tanks due to assembly of the plurality of water tanks is solved.
Thirdly, the sealing process is improved, and the problems of water channel blockage and water leakage in the water tank caused by easy oxidation and corrosion of the welding part of the metal water tank adopted in the early period are solved.
Fourthly, the production operation is simple, the assembly efficiency is improved, and meanwhile, the production cost is reduced.
Drawings
FIG. 1 is a cross-sectional view of the front end construction of the needle bar assembly of the present invention;
FIG. 2 is a cross-sectional view of the shank assembly end construction of the present invention;
FIG. 3 is an assembly view of the lower cover of the water tank of the present invention;
FIG. 4 is a top plan view of the upper cover of the water tank of the present invention;
FIG. 5 is a bottom view of the top cover of the cistern of the present invention;
FIG. 6 isbase:Sub>A sectional view of the upper cover A-A of the water tank of the present invention;
FIG. 7 is an overall cross-sectional view of the water tank of the present invention;
FIG. 8 is an assembly view of the water tank of the present invention;
FIG. 9 is an assembled cross-sectional view of the handle housing of the present invention.
Wherein: 1-radiation head, 1.1-radiation head blind hole, 2-medium tube, 3-needle bar, 4-sealing ring, 5-coaxial cable, 5.1-coaxial cable inner core, 5.2-coaxial cable medium layer, 6-water injection capillary tube, 7-water tank upper cover, 7.1-water inlet tube assembly hole, 7.2-water outlet tube assembly hole, 7.3-coaxial cable connector mounting hole, 8-water tank lower cover, 8.1-outer side wall, 8.2-inner side wall, 9-water inlet tube joint, 10-water outlet tube joint, 11-T-shaped piece, 12-coaxial cable connector, 12.1-coaxial cable connector inner needle, 12.2-coaxial cable connector shell, 13-handle shell, 14-water tank front cavity, 15-water tank rear cavity, 16-water tank upper and lower cover contact surface, 17-needle bar guide groove, and 18-water injection capillary tube guide groove.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a sectional view showing the front end structure of the needle bar assembly of the present invention, which comprises: the radiation head comprises a radiation head 1, a radiation head blind hole 1.1, a medium tube 2, a needle rod 3, a sealing ring 4, a coaxial cable 5, a coaxial cable inner core 5.1 and a coaxial cable medium layer 5.2.
The coaxial cable 5 can adopt a semi-rigid coaxial cable, the inner conductor of the coaxial cable 5, namely the inner core 5.1 of the coaxial cable is arranged in the blind hole of the cylinder at the tail part of the radiation head 1, the coaxial cable can be fixed by riveting and pressing connection, and the firmness of the pressing connection can be ensured by using pneumatic pressing pliers.
The medium tube 2 is assembled on the tail cylinder of the radiation head 1 and fixed, and the medium tube 2 can be made of tetrafluoro material or ceramic material. If the ceramic material can be used for fixing and sealing the contact surfaces of the radiation head 1, the medium tube 2 and the needle rod 3 by using glue and drying in an oven, if the teflon material is used for fixing by interference fit, the teflon material does not need to be filled with the glue for fixing and sealing.
The sealing ring 4 is sleeved in a fixed position of the coaxial cable 5, the distance between the sealing ring (4) and the tail end of the medium pipe (2) is 1mm-2mm, and the sealing between the sealing ring 4 and the coaxial cable 5 can be fixed by ultraviolet irradiation by adopting UV (ultraviolet) glue; the needle rod 3 is sleeved until the tail end of the medium pipe 2 is jointed and fixed, the outer diameter of the sealing ring (4) is in interference fit with the inner diameter of the needle rod (3), and the sealing is carried out by utilizing the material characteristic of the sealing ring (4); outside the coaxial cable 5, a water injection capillary 9 is sleeved in the needle rod 3.
The distance between the front end of the medium tube 2 and the end face of the radiation head 1 is not more than 0.2mm, and the gap between the front end face of the needle rod (3) and the step end face of the medium tube (2) is not more than 0.2mm. Here, assembly errors are minimized, so that the needle bar assembly is formed with higher consistency.
Fig. 2 is a sectional view showing the structure of the tail end of the needle bar assembly of the present invention, which comprises: water injection capillary 6, T-piece 11, coaxial cable connector inner needle 12.1.
The inner pin 12.1 of the coaxial cable connector can be connected with the inner core 5.1 at the tail part of the coaxial cable 5 in a soldering way.
The tee 11 serves to secure the trailing end of the coaxial cable 5 and to seal the coaxial cable 5 at the exit of the rear chamber 15 of the tank.
Fig. 3 shows an assembly view of a lower cover of a water tank according to the present invention, which includes: needle bar 3, water injection capillary 6, water tank lower cover 8, the lateral wall 8.1 of water tank lower cover 8, the inside wall 8.2 of water tank lower cover 8.
When the water tank is installed, the outer side wall 8.1 plays a limiting role on the tail end of the needle rod 3, so that the port of the tail end of the needle rod 3 is flush with the outer side wall 8.1 of the water tank lower cover 8. The inner side wall 8.2 plays a limiting role in the tail end of the water injection capillary tube 6, so that the port at the tail end of the water injection capillary tube 6 is flush with the inner side wall 8.2 of the lower cover 8 of the water tank, and the consistency of the installation positions of the needle rod 3 and the water injection capillary tube 6 is ensured.
Fig. 4 is a plan view of the upper cover of the water tank of the present invention, which comprises: inlet tube pilot hole 7.1, outlet pipe pilot hole 7.2.
Fig. 5 is a bottom view of the upper cover of the water tank of the present invention, which comprises: a water inlet pipe assembling hole 7.1, a water outlet pipe assembling hole 7.2, a water tank front cavity 14, a water tank rear cavity 15 and a coaxial cable connector mounting hole 7.3.
The coaxial cable connector mounting hole 7.3 is used for mounting and sealing the coaxial cable 5. The T-shaped piece 11 is in compression joint with a coaxial cable connector mounting hole 7.3 of the water tank upper cover, the inner diameter of the hole of the coaxial cable connector mounting hole 7.3 is slightly smaller than the outer diameter of an assembling part of the T-shaped piece 11, pressure is applied to complete compression joint, a contact surface of the compression joint is fixedly sealed by UV glue, and a contact part of the coaxial cable 5 and the inner hole of the T-shaped piece 11 is also fixedly sealed by the UV glue, so that sealing between the coaxial cable 5 and the T-shaped piece 11 and sealing between the T-shaped piece 11 and the water tank upper cover 7 are realized.
As shown in fig. 6, the water tank upper coverbase:Sub>A-base:Sub>A of the present invention isbase:Sub>A sectional view in the direction ofbase:Sub>A-base:Sub>A, including: a water inlet pipe assembly hole 7.1, a water tank front cavity 14 and a water tank rear cavity 15.
The water inlet pipe assembly hole 7.1 is communicated with the water tank rear cavity 15, and the water outlet pipe assembly hole 7.2 is also communicated with the water tank front cavity 14.
Fig. 7 is a sectional view of the whole water tank of the present invention, including: the water tank upper cover 7, the water tank lower cover 8, the needle bar guide groove 17, the water injection capillary guide groove 18, the coaxial cable connector mounting hole 7.3, the outer side wall 8.1 of the water tank lower cover 8 corresponds to the corresponding part of the water tank upper cover 7, and the inner side wall 8.2 of the water tank lower cover 8 corresponds to the corresponding part of the water tank upper cover 7. The coaxial cable connector mounting hole 7.3 communicates with the tank rear chamber 15.
The sealing treatment of the water tank comprises sealing between the needle bar 3 and the needle bar guide groove 17 in the needle bar guide groove 17, sealing between the water injection capillary tube 6 and the water injection capillary tube guide groove 18 in the water injection capillary tube guide groove 18, sealing between the T-shaped part 11 and the coaxial cable 5 and sealing between the T-shaped part 11 and the coaxial cable connector mounting hole 7.3. And the sealing between the buckling surfaces of the upper water tank cover 7 and the lower water tank cover 8.
The integrated circulating water tank is made of high polymer materials such as PC, PP, ABS and the like.
Two cavities of the circulating water tank are of an integrated structure and can be molded at one time through a casting mold. The integral water circulation water tank does not need a plurality of parts to form a water storage device, and the sealing performance is ensured to replace the sealing of a silica gel ring by the structure of the water circulation water tank. Circulating water of the structure flows into a water tank rear cavity 15 from a water inlet pipe joint 9, flows to the front end of the needle rod 3 through a gap between the inner wall of the water injection capillary tube 6 and the outer wall of the coaxial cable 5, returns back at the position of the sealing ring 4, flows back to a water tank front cavity 14 through a gap between the inner wall of the needle rod 3 and the outer wall of the water injection capillary tube 6, and flows out through a water outlet pipe joint 10 to form whole water path circulation. The structure shows that the water flow can also flow reversely.
The two valves of the water tank upper cover 7 and the water tank lower cover 8 can also be connected together by one axial side of the two valves during injection molding to form an openable whole.
The handle case 13 and the circulation tank may be separate structures or may be an integrated structure, that is, the handle case 13 has two flaps, i.e., a lower flap of the handle case 13 is integrated with the lower cover 8 of the tank, and an upper flap of the handle case 13 is integrated with the upper cover 7 of the tank, and the lower flap and the upper flap are mounted together during mounting and assembling. When the upper and lower petals of the handle shell (13) are buckled, the upper cover (7) and the lower cover (8) of the water tank are buckled together. The handle housing 13 may be made of a polymer material, such as PC, PP, ABS, etc.
When the handle housing 13 is of a structure with upper and lower lobes, the water inlet pipe connector 9, the water outlet pipe connector 10 and the coaxial cable connector 12 lead out of the pipeline from the handle housing 13 in an outward direction from the upper lobes.
Fig. 8 shows a water tank assembly view of the present invention, including: a water tank upper cover 7, a water inlet pipe joint 9, a water outlet pipe joint 10 and a coaxial cable connector shell 12.2. Also is a mounting component formed by integrating the needle bar component and the water tank component.
Assembling the water inlet pipe joint 9 and the water outlet pipe joint 10 with the water tank upper cover 7, connecting and sealing in a mechanical crimping mode, crimping the coaxial cable connector shell 12.2 with the T-shaped piece 11, and realizing mechanical assembly through interference fit. The outer diameter of the exposed boss of the T-shaped part 11 can be slightly larger than the inner diameter of the shell 12.2 of the coaxial connector, interference fit is achieved by applying pressure mechanically, and connection is firm and reliable.
Fig. 9 is an assembled sectional view of a handle case according to the present invention, including: the water tank assembly comprises a water tank upper cover 7, a water tank lower cover 8, a coaxial cable connector 12, a handle shell 13, a water tank front cavity 14, a water tank rear cavity 15 and other needle rod water tank components, wherein the handle shell 13 is of a left-right two-flap structure.
The coaxial cable connector 12 is composed of a coaxial cable connector inner pin 12.1 and a coaxial cable connector outer shell 12.2.
The needle bar water tank component is positioned inside the handle shell 13, the internal structure of the handle shell 13 can limit the needle bar water tank component to prevent the needle bar water tank component from moving or being installed wrongly, the other half handle shell 13 is buckled, and the click sound can be heard by pressing hard, so far, the whole ablation antenna component with the integrated circulating water tank is formed.
Generally, the structure is simple to operate, the needle rod 3 and the water injection capillary tube 6 are limited, the water circulation effect is good in consistency, and the inside is free of dirt and is not easy to block.
The water tank structure has needle bar 3 and water injection capillary 6 spacing, makes the uniformity of assembly obtain improving, guarantees that the distance from 6 front ends of water injection capillary to sealing washer 4 is invariable, makes hydrologic cycle's cooling effect more stable, and normal ablation in-process tissue can coke and obstruct microwave transmission, and cooling water circulating system can reduce the regional microwave radiation scope that increases of coking, so can guarantee to melt the form more mellow and more stable through guaranteeing cooling water circulating system's stability.
The water tank body is made of transparent PC materials, and is lighter than a metal water tank, the weight of a product with the same specification can be reduced by about 6 grams, and deviation caused by the weight of the water tank in the operation process can be avoided.
Inside hydrologic cycle is realized to the mode of replacing many water tank to connect through integrative structure, it seals to need not the sealing washer, eliminated and lead to the hidden danger of leaking because of the sealing washer is ageing, this structure circulating water flows into cavity 15 behind the water tank from inlet tube connector 9, gap flow to needle bar 3 front end between 6 inner walls of water injection capillary and the coaxial cable 5 outer wall, cavity 14 before the clearance backward flow to the water tank between 3 inner walls of rethread needle bar and the outer wall of water injection capillary 6, it forms whole water route circulation to go out the water tank through outlet tube connector 10 again. The water tanks are bonded or welded by UV or ultrasonic, so that the upper water tank cover 7 and the lower water tank cover 8 are integrated into a whole, and the water tank has good sealing performance; the water tank assembly is simple and convenient to operate, the assembly of the traditional water tank is long in time consumption, one water tank can be normally assembled in about ten minutes, and the assembly of the water tank with the structure can be completed within two minutes. Traditional structure is difficult for realizing batch synchronous production, and this structure water tank can realize batched illumination solidification, and assembly time is still less, and to a great extent improves production efficiency.
The traditional welding causes oxidation and excessive residual dirt inside the water storage device, so that the aperture of water circulation is easily blocked, the water circulation system fails, and the coaxial cable is broken to cause product failure due to serious corrosion; through this structure, can realize more advanced ultrasonic bonding and carry out the water tank butt fusion, the process does not relate to high temperature and scaling powder, and the operation is more simple and convenient, and spare parts such as inside water injection capillary 6 and coaxial cable 5 can not appear by the condition of corruption, so this hydrologic cycle is clean completely, can avoid operation in-process hydrologic cycle to block up and coaxial cable to be corroded cracked problem completely.
The water tank is processed in an injection molding mode, only one set of processing mold is needed, and the water tank is low in cost and easy to process; if traditional water tank structure needs many sets of moulds to accomplish injection moulding if using macromolecular material, the expense of die sinking is high, and spare part is more, including before the water tank, in the water tank, behind the water tank, O type silica gel circle etc. more the cost is higher. The metal water tank is needed to be machined, and the machining cost of materials is more expensive.
The sealing treatment of the invention can adopt UV glue for sealing, the UV glue can be positioned for several seconds, the highest strength can be reached in one minute, and the working efficiency is greatly improved. The ultrasonic welding sealing can also be adopted to weld the welding surface, for example, the buckling surfaces of the lower water tank cover 8 and the upper water tank cover 7 can be welded to realize sealing.
Claims (7)
1. An ablation antenna with an integrated circulation tank, comprising: a needle bar assembly, integrated circulating water tanks (7, 8) and a handle shell (13);
the needle bar subassembly includes: the device comprises a radiation head (1), a medium pipe (2), a needle rod (3), a sealing ring (4), a coaxial cable (5), a water injection capillary tube (6), a T-shaped piece (11) and a coaxial cable connector (12);
an inner core (5.1) of the coaxial cable (5) is arranged in a radiation head blind hole (1.1) at the tail end of the radiation head (1), is electrically connected and is mechanically crimped and fixed; the medium tube (2) is positioned at the tail end of the radiation head (1), the sealing ring (4) is positioned at the tail end of the medium tube (2) and seals a gap between the needle rod (3) and the coaxial cable (5); the front end of the needle rod (3) is arranged at the step of the medium pipe (2), the water injection capillary tube (6) is sleeved outside the coaxial cable (5) and inside the needle rod (3), and the front end of the water injection capillary tube (6) extends to the position of the sealing ring (4);
a water inlet channel is formed in a gap between the outer wall of the coaxial cable (5) and the inner wall of the water injection capillary tube (6); a water outlet channel is formed in a gap between the inner wall of the needle rod (3) and the outer wall of the water injection capillary tube (6); the water channel is folded back at the sealing ring (4);
the T-shaped piece (11) is sleeved at the tail section of the coaxial cable (5) and sealed with the contact surface of the coaxial cable (5), an inner core (5.1) at the tail end of the coaxial cable (5) is welded with an inner needle (12.1) of the coaxial cable connector (12) to form electric connection, and the tail section of the coaxial cable (5) is bent to 90 degrees;
forming the needle bar assembly so far that the radiation head (1) and the inner needle (12.1) of the coaxial cable connector are integrated;
the method is characterized in that:
the integrated circulation tank includes: the water tank comprises a water tank upper cover (7) and a water tank lower cover (8), a water tank front cavity (14) and a water tank rear cavity (15) are arranged in an integrated circulating water tank, a water inlet pipe mounting hole (7.1), a water outlet mounting pipe mounting hole (7.2) and a coaxial cable connector mounting hole (7.3) are formed in the water tank upper cover (7), and a needle rod guide groove (17) and a water injection capillary guide groove (18) are reserved after the water tank upper cover (7) and the water tank lower cover (8) are buckled;
the needle bar assembly penetrates through the circulating water tank, the tail section of the needle bar (3) is arranged in the needle bar guide groove (17), and the tail end face of the needle bar (3) is flush with the outer side wall (8.1) of the front cavity (14) of the water tank; the tail section of the water injection capillary tube (6) is arranged in the water injection capillary tube guide groove (18), and the end surface of the tail part of the water injection capillary tube (6) is flush with the inner side wall (8.2) of the water tank rear cavity (15);
the T-shaped piece (11) is arranged in the coaxial cable connector mounting hole (7.3) in an interference fit mode, and the contact surface of the T-shaped piece and the coaxial cable connector mounting hole is sealed;
the buckling surfaces of the upper water tank cover (7) and the lower water tank cover (8) are sealed, a needle rod guide groove (17) and a water injection capillary guide groove (18) of the upper water tank cover (7) and the lower water tank cover (8) are respectively sealed with the tail section of the needle rod (3) and the tail section of the water injection capillary (6), and the needle rod assembly and the sealed circulating water channel are fixed by buckling two flaps of the upper water tank cover (7) and the lower water tank cover (8); the periphery of the front cavity (14) of the water tank is sealed with the contact surfaces of the upper cover (7) of the water tank and the lower cover (8) of the water tank, and the periphery of the rear cavity (15) of the water tank is sealed with the contact surfaces of the upper cover (7) of the water tank and the lower cover (8) of the water tank;
the coaxial cable connector shell (12.2) is mechanically pressed and fixed with the exposed part of the T-shaped piece (11);
the water inlet pipe joint (9) is arranged in a water inlet pipe assembly hole (7.1) of the water tank upper cover (7), and the combination surface of the water inlet pipe joint and the water inlet pipe assembly hole is sealed; the water outlet pipe joint (10) is arranged at a water outlet pipe assembly hole (7.2) of the water tank upper cover (7), and the combination surface of the water outlet pipe joint and the water outlet pipe assembly hole is sealed;
the needle rod assembly and the water tank assembly form an integral needle rod water tank assembly, circulating water of the structure flows into a rear water tank cavity (15) from a water inlet pipe connector (9), flows to the front end of the needle rod (3) through a gap between the inner wall of a water injection capillary pipe (6) and the outer wall of a coaxial cable (5), returns back at a sealing ring (4), then flows back to a front water tank cavity (14) through a gap between the inner wall of the needle rod (3) and the outer wall of the water injection capillary pipe (6), and flows out of a water tank-shaped complete circulating water path through a water outlet pipe connector (10);
the handle shell (13) comprises a left flap and a right flap, and the needle rod water tank component is arranged in the handle shell (13) and fixed.
2. An ablation antenna with an integrated circulation water tank as claimed in claim 1, characterized in that the water tank upper cover (7), the water tank lower cover (8) and the handle housing (13) are:
the handle shell (13) and the circulating water tank are of an integrated structure, namely the handle shell (13) is divided into an upper flap and a lower flap, the lower flap of the handle shell (13) is integrated with the lower cover (8) of the water tank, and the upper flap of the handle shell (13) is integrated with the upper cover (7) of the water tank;
the water inlet pipe joint (9), the water outlet pipe joint (10) and the coaxial cable connector (12) lead out the pipeline from the upper valve of the handle shell (13).
3. An ablation antenna with an integrated circulation water tank as in one of claims 1-2, wherein:
the gap between the front end of the medium tube (2) and the end face of the radiation head (1) is not more than 0.2mm; the gap between the front end surface of the needle rod (3) and the step end surface of the medium pipe (2) is not more than 0.2mm;
the distance between the seal ring (4) and the tail end of the medium pipe (2) is 1mm-2mm;
the medium pipe (2) is made of ceramic or tetrafluoro material;
the integrated circulating water tank and the handle shell (13) are made of high polymer materials.
4. An ablation antenna with an integrated circulation water tank as in claim 3, wherein:
the integrated circulating water tank is sealed by ultraviolet light curing by using UV glue or sealed by using ultrasonic welding.
5. A method of making an ablation antenna with an integrated circulation tank as in any of claims 1-4, comprising the steps of:
the first step is as follows: needle bar assembly front end assembly
An inner core (5.1) of a coaxial cable (5) is penetrated into a radiation head blind hole (1.1) at the tail end of a radiation head (1) for mechanical compression joint; sleeving the medium tube (2) on the tail end of the radiation head (1) and fixing, and sleeving the sealing ring (4) on the coaxial cable (5) to the tail end of the medium tube (2); the needle rod (3) is sleeved with the coaxial cable (5) and is pushed to the step of the medium pipe (2) and fixed, and the water injection capillary tube (6) is sleeved with the coaxial cable (5) to the sealing ring (4);
so far, the front end assembly of the needle bar component is completed, and an inner core (5.1) forming a coaxial cable (5) is electrically connected with the radiation head (1); a water inlet channel is formed in a gap between the outer wall of the coaxial cable (5) and the inner wall of the water injection capillary tube (6), a water outlet channel is formed in a gap between the inner wall of the needle rod (3) and the outer wall of the water injection capillary tube (6), and the water channel is turned back at the sealing ring (4);
the second step is that: needle bar assembly tail end assembly
Sleeving a T-shaped piece (11) into the tail section of the coaxial cable (5), welding an inner core (5.1) at the tail end of the coaxial cable (5) with an inner needle (12.1) of a coaxial cable connector, and bending the coaxial cable (5) to 90 degrees;
the assembly of the semi-finished needle bar component is completed so that the radiation head (1) and the inner needle (12.1) of the coaxial connector are integrated;
the third step: water tank lower cover assembly
The integrated circulating water tank is formed by buckling a lower water tank cover (8) and an upper water tank cover (7), and two valves of the water tank are buckled to fix the needle rod assembly and the sealed circulating water channel;
the needle bar placing component spans on the lower cover (8) of the water tank, and the needle bar (3) and the water injection capillary tube (6) are respectively arranged in a needle bar guide groove (17) and a water injection capillary tube guide groove (18); the end surface of the tail part of the needle rod (3) is flush with the outer side wall (8.1) of the water tank front cavity (14), and the end surface of the tail part of the water injection capillary tube (6) is flush with the inner side wall (8.2) of the water tank rear cavity (15);
UV glue is dripped into the contact surface of the needle rod (3) and the needle rod guide groove (17) and the contact surface of the water injection capillary tube (6) and the water injection capillary tube guide groove (18) for ultraviolet light irradiation curing and sealing, so that the contact surface of the needle rod (3) and the water tank lower cover (8) is sealed and fixed, and the contact surface of the water injection capillary tube (6) and the water tank lower cover (8) is sealed and fixed;
the fourth step: water tank upper cover assembly
Pressing the T-shaped part (11) into a mounting hole (7.3) of the coaxial cable connector in an interference fit manner, and performing ultraviolet light curing sealing on the contact surface of the T-shaped part and the coaxial cable connector by adopting UV (ultraviolet) glue; the contact surface of the coaxial cable (5) and the inner hole of the T-shaped part (11) is cured and sealed by ultraviolet irradiation by adopting UV glue;
an upper water tank cover (7) is buckled on a lower water tank cover (8), and the contact surface of a needle rod (3) and a needle rod guide groove (17) of the upper water tank cover (7) and the contact surface of a water injection capillary tube (6) and a water injection capillary tube guide groove (18) of the upper water tank cover (7) adopt UV glue for ultraviolet light curing and sealing; the contact surface between the needle rod (3) and the upper cover (7) of the water tank is sealed and fixed, and the contact surface between the water injection capillary tube (6) and the upper cover (7) of the water tank is sealed and fixed;
the buckling surfaces of the upper water tank cover (7) and the lower water tank cover (8) are sealed by ultrasonic welding, so that the front water tank chamber (14) and the rear water tank chamber (15) are sealed;
mechanically crimping and fixing the coaxial cable connector shell (12.2) and the exposed part of the T-shaped piece (11);
pressing a water inlet pipe joint (9) into a water inlet pipe assembling hole (7.1) of a water tank upper cover (7), and carrying out ultraviolet light curing and sealing on a combined surface by adopting UV glue; the water outlet pipe joint (10) is pressed into a water outlet pipe assembling hole (7.2) of the water tank upper cover (7), and the combined surface is cured and sealed by ultraviolet irradiation by adopting UV glue;
the buckling surface of the upper water tank cover (7) and the lower water tank cover (8) is cured and sealed by adopting UV glue, and the UV glue is dripped into the buckling surface of the upper water tank cover (7) and the lower water tank cover (8) to carry out ultraviolet light curing and sealing;
so far the needle bar assembly and the water tank assembly form a whole, and the assembly of the needle bar water tank assembly is completed;
the fifth step: handle housing (13) assembly
The handle shell (13) is divided into a left valve and a right valve, the assembled needle rod water tank component is clamped into the inner notch of the handle shell (13), and the other valve of the handle shell is covered and pressed to complete the integral assembly of the ablation antenna.
6. The method of claim 5, wherein the fifth step comprises: assembling a handle shell (13);
the handle shell (13) and the circulating water tank are of an integrated structure, namely the handle shell (13) is divided into an upper flap and a lower flap, the lower flap of the handle shell (13) is integrated with the lower cover (8) of the water tank, and the upper flap of the handle shell (13) is integrated with the upper cover (7) of the water tank;
in the third step: when the lower cover of the water tank is assembled, the lower valve of the handle shell (13) is assembled together with the lower cover (8) of the water tank;
in the fourth step: when the upper cover of the water tank is assembled, the upper valve of the handle shell (13) is assembled together with the upper cover (7) of the water tank;
the water inlet pipe joint (9), the water outlet pipe joint (10) and the coaxial cable connector (12) lead out the pipeline from the handle shell (13) in the outward direction.
7. A method of forming an ablation antenna with an integral circulation water tank as in any of claims 5-6, wherein:
the gap between the front end of the medium tube (2) and the end face of the radiation head (1) is not more than 0.2mm, the gap between the front end face of the needle rod (3) and the step end face of the medium tube (2) is not more than 0.2mm, and the distance between the sealing ring (4) and the tail end of the medium tube (2) is 1mm-2mm;
the medium tube (2) is made of ceramic or tetrafluoro material, when the medium tube (2) is made of ceramic material, the contact surfaces of the sealed radiation head (1), the medium tube (2) and the needle rod (3) are fixed by using glue and drying, and when the medium tube (2) is made of tetrafluoro material, the contact surfaces of the sealed radiation head (1), the medium tube (2) and the needle rod (3) are fixed by interference fit;
the seal between the seal ring (4) and the coaxial cable (5) adopts UV glue for ultraviolet illumination fixation, and the outer diameter of the seal ring (4) and the inner diameter of the needle rod (3) are sealed in interference fit;
the integrated circulating water tank and the handle shell (13) are made of high polymer materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211037588.9A CN115813539A (en) | 2022-08-26 | 2022-08-26 | Ablation antenna with integrated circulating water tank and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211037588.9A CN115813539A (en) | 2022-08-26 | 2022-08-26 | Ablation antenna with integrated circulating water tank and manufacturing method thereof |
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| CN115813539A true CN115813539A (en) | 2023-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211037588.9A Pending CN115813539A (en) | 2022-08-26 | 2022-08-26 | Ablation antenna with integrated circulating water tank and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116898567A (en) * | 2023-09-06 | 2023-10-20 | 海杰亚（北京）医疗器械有限公司 | Composite ablation needle and ablation system |
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2022
- 2022-08-26 CN CN202211037588.9A patent/CN115813539A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116898567A (en) * | 2023-09-06 | 2023-10-20 | 海杰亚（北京）医疗器械有限公司 | Composite ablation needle and ablation system |
| CN116898567B (en) * | 2023-09-06 | 2023-12-19 | 海杰亚（北京）医疗器械有限公司 | Composite ablation needle and ablation system |
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